Internal Communication: What Goes in Chat, Email, or Conversation

Why internal communication in a small company falls out of step

In a company with 20 employees, hundreds of internal messages flow on a normal day. Questions in chat, emails with five people copied, calls between two appointments, shouts across the hallway. Much of it is necessary. But some of the messages interrupt people who are concentrating, and some are missing exactly when someone wants to look up what was decided.

The problem is rarely the volume alone. It lies in content landing in the wrong channel. Criticism is voiced in chat, a decision is made in a phone call and recorded nowhere, information for everyone is sent as an email to everyone that nobody reads to the end.

This article answers the question: which content in a company belongs in chat, which in email, and which in conversation, so that information arrives without everyone being constantly interrupted? To answer, we first clarify the terms, then present media richness theory, examine the findings on work email, weigh two perspectives on availability, and derive a simple rule for daily work.

The wrong channel turns a clear message into a misunderstanding and a sensitive one into a conflict.

Terms: channel, synchronous, asynchronous, ambiguous

A channel is the route by which a message is transmitted: conversation, phone, video call, chat, email, an entry in the task tool. Synchronous means that sender and receiver take part at the same time, as in a conversation. Asynchronous means that the receiver reads the message whenever convenient, as with email. Chat lies in between. It is built to be asynchronous but is often used as if an immediate reply were required.

A second pair of terms matters for choosing the channel. A message is clear when everyone involved understands it the same way: 'The appointment with the customer is Tuesday at 10 a.m.' It is ambiguous when it can be interpreted differently or when a shared interpretation first has to emerge: 'We need to talk about the project's priorities.' With clear messages, at most a piece of information is missing. With ambiguous ones, a shared understanding is missing.

An everyday comparison makes the difference tangible. A shopping list can be written on a slip of paper. The question of whether to move into a bigger apartment is not settled on a slip of paper but at the kitchen table. In a company this obvious point is often forgotten, because the slip of paper, in other words the chat, happens to be quicker to hand.

The thinking model: media richness theory

Richard Daft and Robert Lengel developed media richness theory in the 1980s (Daft and Lengel 1986). It ranks channels by how much information they can carry at once. The yardstick is four features: how quickly feedback is possible, how many cues are transmitted, such as voice, facial expression, and gesture, whether natural language is used, and how personally the message is tailored. Face-to-face conversation is the richest medium, a form the leanest. The core statement: the more ambiguous a message, the richer the channel should be. For clear messages, a lean channel is more efficient.

The theory was later refined. In their theory of media synchronicity, Dennis, Fuller, and Valacich (2008) distinguish between conveying information and converging on a shared interpretation. The article on how to organize distributed teams describes this view in detail. In daily work, both theories lead to the same rule of thumb: information that has to be read carefully belongs in written channels, agreement on ambiguous matters belongs in conversation.

What studies show about email and availability

Russell, Jackson, Fullman, and colleagues (2024) evaluated 25 years of research on work email in a systematic review. From 62 empirical papers in psychology, management, and information systems, they sorted the behaviors studied by whether they promote performance, well-being, or both. They call four behaviors super actions because they support both at once: communicating and keeping to times of availability, regularly triaging the inbox by priority, sending only work-relevant messages, and writing politely and considerately.

Among the inconsiderate actions, the authors count delegating tasks by email without discussion, pressuring for an immediate reply, sending ambiguous or overly terse content, and using copy or reply-all inappropriately. An apparent contradiction is revealing: continuously enabled notifications were associated with better performance in some studies and with worse well-being in others. The authors explain this by noting that reacting immediately is a well-practiced habit that meets expectations in the short term and costs energy in the long term.

In a study combining survey and interview data, Barley, Meyerson, and Grodal (2011) found that the more time people spent on email, the more overloaded they felt. At the same time, the more emails they processed, the better able they felt to cope with the work. The authors interpret this as email having become the symbol of overload while distracting from other causes, such as too many meetings and phone calls.

Instantly available or batched? Two perspectives

The first perspective emphasizes speed. In a small company, a lot depends on short paths. Anyone with a question should be allowed to ask it right away and get a quick answer. A customer on the phone will not wait until a colleague has opened her inbox.

The second perspective emphasizes concentration. Anyone interrupted every few minutes takes longer for every task and makes more mistakes. Messages should therefore be read in batches, at fixed times, and only urgent matters may interrupt.

Both perspectives describe real needs. The findings of Russell and colleagues point to a solution that combines them: do not leave availability to chance, announce it. If it is clear that chat gets an answer within two hours and urgent matters come by phone, anyone can switch off notifications for a while without anything being left undone. I consider this the real lever: the channels are not the problem, but the unspoken expectation of answering immediately on every channel.

The three-question rule: which channel for which message

The tool of this article is a rule anyone can apply in a few seconds before sending. It asks three questions in a fixed order. The first question answered with yes determines the channel.

1. Is the message sensitive or ambiguous?

   Criticism, conflicts, decisions involving trade-offs, bad news. Then it belongs in conversation or on the phone. The result is recorded afterwards in two sentences.

2. Does it need to be findable later, or does it go outside?

   Commitments, figures, documents, anything with customers and suppliers. Then it belongs in email, in the task tool, or in the filing system, not in chat.

3. Is it short and urgent within hours?

   A clear question in daily business. Then it belongs in chat, addressed to one person and not to everyone.

For messages that fit none of the three questions: they can wait. Usually they belong in the next weekly meeting. How to run meetings so that decisions are made there rather than just information shared is described in the article on fewer meetings and better decisions. And how to deliver bad news in conversation in a way that preserves trust is shown in the article on delivering bad news.

What the rule changes in daily work: a worked example

The example shows what typically shifts. The number of interruptions falls because messages go to one person instead of everyone and because response times remove the feeling of having to react immediately. The phone, by contrast, is used somewhat more often, because sensitive and urgent topics belong there. That is intended. A three-minute call often replaces a chat thread of 20 messages.

Beyond the individual case, the rule also affects handoffs between areas. Passing on information only through distribution lists increases the quantity, not the effect, as the article on interfaces between departments shows with findings. And where it is defined who may decide what alone, many follow-up questions disappear entirely, as the article on setting decision rights describes.

Conclusion: what goes in chat, what in email, what in conversation?

The guiding question was which content in a company belongs in which channel. Media richness theory provides the basic rule: ambiguous and sensitive matters belong in conversation, clear ones in lean channels. This leads to a simple division. Conversation is for criticism, conflicts, and decisions involving trade-offs; email and the task tool for everything that needs to be findable later or goes outside; chat for short, clear questions that need an answer within hours. The review by Russell and colleagues also shows that announced availability and considerate writing support both performance and well-being. Good internal communication therefore comes less from a new tool than from three questions before sending and response times everyone knows.

First steps for this week

• Present the three-question rule in a team meeting, with examples from last week.
• Set response times for chat and email and name the route for urgent matters.
• Designate a fixed place where decisions are recorded.
• Review distribution lists and group chats and close any that nobody needs.
• For one week, make sure yourself not to send any criticism or decision by chat.

The last point has the strongest effect. How the owner communicates is imitated in the company faster than any rule on paper.